The Top 2 crews dance to music from the upcoming concert film "Katy Perry: Part of Me" after meeting the pop starlet. Then, America's Best Dance Crew is crowned in the Season 7 finale. The hour also features performances by past champions.

The Top 2 crews dance to music from the upcoming concert film "Katy Perry: Part of Me" after meeting the pop starlet. Then, America's Best Dance Crew is crowned in the Season 7 finale. The hour also features performances by past champions.